Improvement in machines for sawing staves



ASSARIA REWRICK, OF SAN FRANCISCO, CALIFORNIA.

Letters Patent No. 113,565, dated April 11, 1871.

IMPROVEMENT IN MACHINES FOR SAWING STAVES.

The Schedule referred to4 in these Letters Patent and making part of thesame.

Toall whom it may concern:

Be it known that I, Assnnm REWRIGK, of the city and county of SanFrancisco, State ofCalifornia, have .invented an Improved Machine forSawing -Barrel- Staves; and Ido hereby declare the following descriptionand accompanying drawing are sucient to enable any person skilled in thelart or'science to which it most nearly appertains to make and use mysaid invention or improvement without further invention or experiment. vp

My invention relates to improvementsin mounting and operating saws whichare intended to be used for sawing out circular work, such as isrequired in forming or shaping barrel-staves in the rough; and

It consists 'in the employment of a cylindrical or band-saw, which ismounted upon a series of frictionrollers, which 4is arranged circularlyand driven byan endless belt. -They are adjustable to and from thecenter, so that any desired circle can be obtained by shifting them tothe proper' position.

4In order to describe rn-y invention more fully, reference is had to theaccompanying drawing forming a p'art of this speeiication, in which Arepresents a strong'fraine.

B is a strong metal late, of any desired shape, which is securedvvertically to one'of the timbers ot' the frame.

Throughthis plate, and on radial lines from its-center, is made a numberof slots, c c.

In these slots boxes d are secured so that they can be adjusted to orfrom Uthe center, as` desired.

In each of theseboxes are-placed friction-rollers e, so asrto standparallel with the vertical plate B.

rlhesc rollers will then be arranged in a circle around the inner faceof the plate B, and a cylindrical or band-saw, f, is placed over them,so as to revolve upon the rollers, with its teeth outward, Vas shown.

A shaft, G, passes across the rear end of the frame and carries'apulley, H.

Vertical standards I extend upward on each side of the cylindrical saw,f, justin front oi' `its center, and also'extend below it under theframe. y

A small shaft, bears in these standards, passing across nearly on alevel with the top of the saw, and carries a pulley, it.

A similar shaft and pulley also pass across from one standard tothe-other, below the saw, and also carry a pulley, l. p

An endless belt, m, passes around the lower pulley, l, and then iscarried back half way around the saw f, until it comes to its top. It isthen carried around the upper pulley k, and back around the large.pulley H The revolution of the pulley H then causes the belt toY revolvethe saw upon the friction-rollers e, leaving one-half' of the sawWithout anythingto interfere with the block of wood being fed to it tobe sawed.

A table, P, is arranged in front of the free half oi' l the saw, audhasa slide, q, upon it, which travels in a circular groove `or channel inthe upper surface of the table.

The block 'of wood to be ,sawed is placHl on this slide, which carriesit to the saw on a curved line, thus giving the proper longitudinalandtiausverse concave tothe staves.

The friction-rollers can be adjusted back and forth'V in the slots, asdesired,'and thus run the saw in any desired shape, so as to givedifferent-degrees of con.- cave atthesawingpoint.

Havingthus described my invention,

What I claim, and desire to secure bypLetters Patent, irl-'- 1. Theplate B, slotted as described, and having; projections I I, formingsupports for the pulleys k l, in combination with the adjustable boxes dand friction-rollers c, substantially as shown, and for the purposedescribed.

2. The pulleys 7c l, secured above and below and to one side the centerof the revolving saw f, and the large pulley H, in combination withtheendless belt m, arranged to encircle the larger part oi' the saw, asdescribed, for the purpose 'specilied ASSARIA REWRICK.

Witnesses:

GEO. H. S'rnone, WM. H. ItuNNnLs.

